FE modeling of multiple SMA wire actuated adaptive structures

Nicole M. Lewis; Stefan Seelecke

doi:10.1117/12.883554

27 April 2011 FE modeling of multiple SMA wire actuated adaptive structures

Nicole M. Lewis, Stefan Seelecke

Proceedings Volume 7978, Behavior and Mechanics of Multifunctional Materials and Composites 2011; 79781D (2011) https://doi.org/10.1117/12.883554
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

This paper presents a Finite Element Analysis (FEA) of an adaptive structure that uses multiple Shape Memory Alloy (SMA) wires for actuation. The commercially available FEA program ABAQUS was used to simulate the displacement of an adaptive nozzle structure which is actuated by controlling the power to six SMA wires simultaneously. The SMA wires were modeled within the user material (UMAT) feature using a mesoscopic free energy model [1] to accurately describe their thermomechanically coupled actuator behavior. During simulations, the required heat input, wire temperature, phase fraction changes, resulting strains, stresses, and the mechanical interactions with the structure were determined for each SMA wire. Second order effects of wire coupling were also observed and analyzed. The results from the simulation were compared with experimental measurements taken with the current adaptive nozzle prototype.

Citation Download Citation

Nicole M. Lewis and Stefan Seelecke "FE modeling of multiple SMA wire actuated adaptive structures", Proc. SPIE 7978, Behavior and Mechanics of Multifunctional Materials and Composites 2011, 79781D (27 April 2011); https://doi.org/10.1117/12.883554

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KEYWORDS

Shape memory alloys

3D modeling

Finite element methods

Prototyping

Actuators

Protactinium

Atmospheric modeling

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